I plan to use a 3 conductor white AC extension cord running along the eaves of
my house instead of the regular whip that came with my screwdriver antenna.
(There will be some slack to allow for coil movement). The idea is to disguise
the antenna (the base will be hidden). Plus this will give me more length -
probably about 25 ft. I will connect all 3 wires together at the bottom, but
plan to leave them unconnected at the top. Or should I connect them? Any
disadvantages?

Thanks,

Ron, W4TQT